Quarter	Percent, Seasonally Adjusted
1999-04-01	48.7661872223644
1999-07-01	49.4917731203016
1999-10-01	49.8079821047066
2000-01-01	50.0463932792531
2000-04-01	50.6543017258432
2000-07-01	50.5787147157617
2000-10-01	50.4220120719669
2001-01-01	50.2764779113189
2001-04-01	49.4811498330198
2001-07-01	49.1289789819407
2001-10-01	48.4395905903167
2002-01-01	48.0275537222316
2002-04-01	47.5012087049480
2002-07-01	47.4367951870235
2002-10-01	47.3213370169208
2003-01-01	47.1589899097535
2003-04-01	47.8218647631584
2003-07-01	47.4243144514117
2003-10-01	47.5653370127314
2004-01-01	47.7878720399228
2004-04-01	47.3355194929477
2004-07-01	47.6375942990773
2004-10-01	48.1246134773638
2005-01-01	48.3519956177527
2005-04-01	48.5635983292886
2005-07-01	48.9043903591919
2005-10-01	49.0555450733542
2006-01-01	49.7319743561292
2006-04-01	50.0430989746791
2006-07-01	50.4278338374365
2006-10-01	50.8384223912774
2007-01-01	64.0614506870393
2007-04-01	63.4474412306207
2007-07-01	62.4460380656806
2007-10-01	62.1428269412064
2008-01-01	60.7170080610525
2008-04-01	58.8069948288807
2008-07-01	56.6708653044809
2008-10-01	52.0561864616717
2009-01-01	49.4932054054719
2009-04-01	46.1011779194943
2009-07-01	43.5474833689693
2009-10-01	42.0818078293416
2010-01-01	39.9041437691753
2010-04-01	39.2203364385521
2010-07-01	38.4291886847447
2010-10-01	37.2134455730530
2011-01-01	36.9606669233170
2011-04-01	36.1463979952624
2011-07-01	35.2828067542614
2011-10-01	36.2773544383793
2012-01-01	34.6575613762704
2012-04-01	34.4904501523971
2012-07-01	34.7263728411274
2012-10-01	35.3464544680340
2013-01-01	36.0384596511170
2013-04-01	36.6807975235533
2013-07-01	36.8896357084063
2013-10-01	36.6046963803232
2014-01-01	36.1332656842740
2014-04-01	35.9551178310848
2014-07-01	37.3349368626542
2014-10-01	37.7669105928962
2015-01-01	37.2669978640848
2015-04-01	37.6395334405980
2015-07-01	38.1756971799167
2015-10-01	38.2560983984352
2016-01-01	39.3971129198681
2016-04-01	43.3611947465628
2016-07-01	43.1970726667583
2016-10-01	42.4162002715101
2017-01-01	41.8536392123058
2017-04-01	41.1166676423066
2017-07-01	37.4117263944998
2017-10-01	39.6187198358336
2018-01-01	39.4615144384756
2018-04-01	39.9157556215461